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click-action: don't use pointer grabs

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The same behavior can be achieved by capturing events on stage while
button is pressed. This fixes a problem when using click and drag
actions on the same actor as there no grabs involved.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2409
This commit is contained in:
Lucas Rocha 2010-11-11 22:23:09 +00:00 committed by Emmanuele Bassi
parent dfdd591414
commit 03a713e18e
1 changed files with 73 additions and 24 deletions
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97
clutter/clutter-click-action.c
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@ -61,7 +61,10 @@
struct _ClutterClickActionPrivate
{
ClutterActor *stage;
guint event_id;
gulong capture_id;
guint press_button;
@ -92,6 +95,11 @@ static guint click_signals[LAST_SIGNAL] = { 0, };
G_DEFINE_TYPE (ClutterClickAction, clutter_click_action, CLUTTER_TYPE_ACTION);
/* forward declaration */
static gboolean on_captured_event (ClutterActor *stage,
ClutterEvent *event,
ClutterClickAction *action);
static inline void
click_action_set_pressed (ClutterClickAction *action,
gboolean is_pressed)
@ -111,7 +119,6 @@ on_event (ClutterActor *actor,
ClutterClickAction *action)
{
ClutterClickActionPrivate *priv = action->priv;
gboolean res = FALSE;
if (!clutter_actor_meta_get_enabled (CLUTTER_ACTOR_META (action)))
return FALSE;
@ -130,29 +137,15 @@ on_event (ClutterActor *actor,
priv->is_held = TRUE;
priv->press_button = clutter_event_get_button (event);
clutter_grab_pointer (actor);
if (priv->stage == NULL)
priv->stage = clutter_actor_get_stage (actor);
priv->capture_id = g_signal_connect_after (priv->stage, "captured-event",
G_CALLBACK (on_captured_event),
action);
click_action_set_pressed (action, TRUE);
res = TRUE;
break;
case CLUTTER_BUTTON_RELEASE:
if (clutter_event_get_button (event) != priv->press_button ||
clutter_event_get_click_count (event) != 1)
return FALSE;
if (!priv->is_held)
return TRUE;
priv->is_held = FALSE;
clutter_ungrab_pointer ();
if (!clutter_actor_contains (actor, clutter_event_get_source (event)))
return FALSE;
click_action_set_pressed (action, FALSE);
g_signal_emit (action, click_signals[CLICKED], 0, actor);
res = TRUE;
break;
case CLUTTER_ENTER:
@ -167,7 +160,50 @@ on_event (ClutterActor *actor,
break;
}
return res;
return FALSE;
}
static gboolean
on_captured_event (ClutterActor *stage,
ClutterEvent *event,
ClutterClickAction *action)
{
ClutterClickActionPrivate *priv = action->priv;
ClutterActor *actor;
actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (action));
switch (clutter_event_type (event))
{
case CLUTTER_BUTTON_RELEASE:
if (!priv->is_held)
return TRUE;
if (clutter_event_get_button (event) != priv->press_button ||
clutter_event_get_click_count (event) != 1)
return FALSE;
priv->is_held = FALSE;
/* disconnect the capture */
if (priv->capture_id != 0)
{
g_signal_handler_disconnect (priv->stage, priv->capture_id);
priv->capture_id = 0;
}
if (!clutter_actor_contains (actor, clutter_event_get_source (event)))
return FALSE;
click_action_set_pressed (action, FALSE);
g_signal_emit (action, click_signals[CLICKED], 0, actor);
break;
default:
break;
}
return FALSE;
}
static void
@ -184,6 +220,13 @@ clutter_click_action_set_actor (ClutterActorMeta *meta,
priv->event_id = 0;
}
if (priv->capture_id != 0)
{
g_signal_handler_disconnect (priv->stage, priv->capture_id);
priv->capture_id = 0;
priv->stage = NULL;
}
if (actor != NULL)
priv->event_id = g_signal_connect (actor, "event",
G_CALLBACK (on_event),
@ -329,7 +372,13 @@ clutter_click_action_release (ClutterClickAction *action)
return;
priv->is_held = FALSE;
clutter_ungrab_pointer ();
/* disconnect the capture */
if (priv->capture_id != 0)
{
g_signal_handler_disconnect (priv->stage, priv->capture_id);
priv->capture_id = 0;
}
click_action_set_pressed (action, FALSE);
}